df.c revision 1.102
1 /* $NetBSD: df.c,v 1.102 2023/12/18 08:27:24 kre Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __COPYRIGHT( 40 "@(#) Copyright (c) 1980, 1990, 1993, 1994\ 41 The Regents of the University of California. All rights reserved."); 42 #endif /* not lint */ 43 44 #ifndef lint 45 #if 0 46 static char sccsid[] = "@(#)df.c 8.7 (Berkeley) 4/2/94"; 47 #else 48 __RCSID("$NetBSD: df.c,v 1.102 2023/12/18 08:27:24 kre Exp $"); 49 #endif 50 #endif /* not lint */ 51 52 #include <sys/param.h> 53 #include <sys/stat.h> 54 #include <sys/mount.h> 55 56 #include <assert.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <stdbool.h> 60 #include <fcntl.h> 61 #include <locale.h> 62 #include <util.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include <util.h> 68 69 static char *getmntpt(const char *); 70 static void addstat(struct statvfs *, const struct statvfs *); 71 static void prtstat(const struct statvfs *, int); 72 static int selected(const char *, size_t); 73 static void maketypelist(char *); 74 static size_t regetmntinfo(struct statvfs **, size_t); 75 __dead static void usage(void); 76 static void prthumanval(int64_t, int); 77 static void prthuman(const struct statvfs *, int64_t, int64_t); 78 79 static int aflag, cflag, fflag, gflag, hflag, iflag, lflag; 80 static int Nflag, nflag, Pflag, Wflag; 81 static long usize; 82 static char **typelist; 83 static size_t mntcount; 84 85 #define WIDTH_INODE 10 86 #define WIDTH_BLKSIZE 12 87 static int blksize_width = WIDTH_BLKSIZE; 88 89 static int fudgeunits = 0; 90 91 int 92 main(int argc, char *argv[]) 93 { 94 struct stat stbuf; 95 struct statvfs *mntbuf, totals; 96 int ch, maxwidth, width; 97 size_t i; 98 char *mntpt; 99 100 setprogname(argv[0]); 101 (void)setlocale(LC_ALL, ""); 102 103 while ((ch = getopt(argc, argv, "abcfGgHhiklmNnPt:W")) != -1) 104 switch (ch) { 105 case 'a': 106 aflag = 1; 107 break; 108 case 'b': 109 hflag = 0; 110 usize = 512; 111 break; 112 case 'c': 113 cflag = 1; 114 break; 115 case 'f': 116 fflag = 1; 117 break; 118 case 'g': 119 hflag = 0; 120 usize = 1024 * 1024 * 1024; 121 break; 122 case 'G': 123 gflag = 1; 124 break; 125 case 'H': 126 fudgeunits = HN_DIVISOR_1000; 127 /* FALL THROUGH */ 128 case 'h': 129 hflag = 1; 130 usize = 0; 131 break; 132 case 'i': 133 iflag = 1; 134 break; 135 case 'k': 136 hflag = 0; 137 usize = 1024; 138 break; 139 case 'l': 140 lflag = 1; 141 break; 142 case 'm': 143 hflag = 0; 144 usize = 1024 * 1024; 145 break; 146 case 'N': 147 Nflag = 1; 148 break; 149 case 'n': 150 nflag = 1; 151 break; 152 case 'P': 153 Pflag = 1; 154 break; 155 case 'W': 156 Wflag = 1; 157 break; 158 case 't': 159 if (typelist != NULL) 160 errx(EXIT_FAILURE, 161 "only one -t option may be specified."); 162 maketypelist(optarg); 163 break; 164 case '?': 165 default: 166 usage(); 167 } 168 169 if (fflag && (Pflag || gflag)) 170 errx(EXIT_FAILURE, 171 "only one of -f -G and -P may be specified"); 172 if (gflag && (Pflag || iflag)) 173 errx(EXIT_FAILURE, 174 "only one of -G and -P or -i may be specified"); 175 if (Pflag && iflag) 176 errx(EXIT_FAILURE, 177 "only one of -P and -i may be specified"); 178 if (fflag) 179 Nflag = 1; 180 181 #if 0 182 /* 183 * The block size cannot be checked until after getbsize() is called. 184 */ 185 if (Pflag && (hflag || (usize != 1024 && usize != 512))) 186 errx(EXIT_FAILURE, 187 "non-standard block size incompatible with -P"); 188 #endif 189 argc -= optind; 190 argv += optind; 191 192 mntcount = getmntinfo(&mntbuf, MNT_NOWAIT); 193 if (mntcount == 0) 194 err(EXIT_FAILURE, 195 "retrieving information on mounted file systems"); 196 197 if (*argv == NULL) { 198 mntcount = regetmntinfo(&mntbuf, mntcount); 199 } else { 200 if ((mntbuf = calloc(argc, sizeof(*mntbuf))) == NULL) 201 err(EXIT_FAILURE, "can't allocate statvfs array"); 202 mntcount = 0; 203 for (/*EMPTY*/; *argv != NULL; argv++) { 204 if (stat(*argv, &stbuf) < 0) { 205 if ((mntpt = getmntpt(*argv)) == 0) { 206 warn("%s", *argv); 207 continue; 208 } 209 } else if (S_ISBLK(stbuf.st_mode)) { 210 if ((mntpt = getmntpt(*argv)) == 0) 211 mntpt = *argv; 212 } else 213 mntpt = *argv; 214 /* 215 * Statfs does not take a `wait' flag, so we cannot 216 * implement nflag here. 217 */ 218 if (!statvfs(mntpt, &mntbuf[mntcount])) 219 if (lflag && 220 (mntbuf[mntcount].f_flag & MNT_LOCAL) == 0) 221 warnx("Warning: %s is not a local %s", 222 *argv, "file system"); 223 else if 224 (!selected(mntbuf[mntcount].f_fstypename, 225 sizeof(mntbuf[mntcount].f_fstypename))) 226 warnx("Warning: %s mounted as a %s %s", 227 *argv, 228 mntbuf[mntcount].f_fstypename, 229 "file system"); 230 else 231 ++mntcount; 232 else 233 warn("%s", *argv); 234 } 235 } 236 237 if (cflag) { 238 memset(&totals, 0, sizeof(totals)); 239 totals.f_frsize = DEV_BSIZE; 240 strlcpy(totals.f_mntfromname, "total", 241 sizeof(totals.f_mntfromname)); 242 } 243 244 maxwidth = 0; 245 for (i = 0; i < mntcount; i++) { 246 width = 0; 247 if (Wflag && mntbuf[i].f_mntfromlabel[0]) { 248 /* +5 is for "NAME=" added later */ 249 width = (int)strlen(mntbuf[i].f_mntfromlabel) + 5; 250 } 251 if (width == 0) 252 width = (int)strlen(mntbuf[i].f_mntfromname); 253 if (width > maxwidth) 254 maxwidth = width; 255 if (cflag) 256 addstat(&totals, &mntbuf[i]); 257 } 258 259 if (cflag == 0 || fflag == 0) 260 for (i = 0; i < mntcount; i++) 261 prtstat(&mntbuf[i], maxwidth); 262 263 mntcount = fflag; 264 if (cflag) 265 prtstat(&totals, maxwidth); 266 267 return 0; 268 } 269 270 static char * 271 getmntpt(const char *name) 272 { 273 size_t count, i; 274 struct statvfs *mntbuf; 275 276 count = getmntinfo(&mntbuf, MNT_NOWAIT); 277 if (count == 0) 278 err(EXIT_FAILURE, "Can't get mount information"); 279 for (i = 0; i < count; i++) { 280 if (!strcmp(mntbuf[i].f_mntfromname, name)) 281 return mntbuf[i].f_mntonname; 282 } 283 return 0; 284 } 285 286 static enum { IN_LIST, NOT_IN_LIST } which; 287 288 static int 289 selected(const char *type, size_t len) 290 { 291 char **av; 292 293 /* If no type specified, it's always selected. */ 294 if (typelist == NULL) 295 return 1; 296 for (av = typelist; *av != NULL; ++av) 297 if (!strncmp(type, *av, len)) 298 return which == IN_LIST ? 1 : 0; 299 return which == IN_LIST ? 0 : 1; 300 } 301 302 static void 303 maketypelist(char *fslist) 304 { 305 size_t i; 306 char *nextcp, **av; 307 308 if ((fslist == NULL) || (fslist[0] == '\0')) 309 errx(EXIT_FAILURE, "empty type list"); 310 311 /* 312 * XXX 313 * Note: the syntax is "noxxx,yyy" for no xxx's and 314 * no yyy's, not the more intuitive "noyyy,noyyy". 315 */ 316 if (fslist[0] == 'n' && fslist[1] == 'o') { 317 fslist += 2; 318 which = NOT_IN_LIST; 319 } else 320 which = IN_LIST; 321 322 /* Count the number of types. */ 323 for (i = 1, nextcp = fslist; 324 (nextcp = strchr(nextcp, ',')) != NULL; i++) 325 ++nextcp; 326 327 /* Build an array of that many types. */ 328 if ((av = typelist = calloc((i + 1), sizeof(*av))) == NULL) 329 err(EXIT_FAILURE, "can't allocate type array"); 330 av[0] = fslist; 331 for (i = 1, nextcp = fslist; 332 (nextcp = strchr(nextcp, ',')) != NULL; i++) { 333 *nextcp = '\0'; 334 av[i] = ++nextcp; 335 } 336 /* Terminate the array. */ 337 av[i] = NULL; 338 } 339 340 /* 341 * Make a pass over the filesystem info in ``mntbuf'' filtering out 342 * filesystem types not in ``fsmask'' and possibly re-stating to get 343 * current (not cached) info. Returns the new count of valid statvfs bufs. 344 */ 345 static size_t 346 regetmntinfo(struct statvfs **mntbufp, size_t count) 347 { 348 size_t i, j; 349 struct statvfs *mntbuf; 350 351 if (!lflag && typelist == NULL && aflag) 352 return nflag ? count : (size_t)getmntinfo(mntbufp, MNT_WAIT); 353 354 mntbuf = *mntbufp; 355 j = 0; 356 for (i = 0; i < count; i++) { 357 if (!aflag && (mntbuf[i].f_flag & MNT_IGNORE) != 0) 358 continue; 359 if (lflag && (mntbuf[i].f_flag & MNT_LOCAL) == 0) 360 continue; 361 if (!selected(mntbuf[i].f_fstypename, 362 sizeof(mntbuf[i].f_fstypename))) 363 continue; 364 if (nflag) 365 mntbuf[j] = mntbuf[i]; 366 else { 367 struct statvfs layerbuf = mntbuf[i]; 368 (void)statvfs(mntbuf[i].f_mntonname, &mntbuf[j]); 369 /* 370 * If the FS name changed, then new data is for 371 * a different layer and we don't want it. 372 */ 373 if (memcmp(layerbuf.f_mntfromname, 374 mntbuf[j].f_mntfromname, MNAMELEN)) 375 mntbuf[j] = layerbuf; 376 } 377 j++; 378 } 379 return j; 380 } 381 382 static void 383 prthumanval(int64_t bytes, int width) 384 { 385 char buf[6]; 386 387 (void)humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 388 bytes, "", HN_AUTOSCALE, 389 HN_B | HN_NOSPACE | HN_DECIMAL | fudgeunits); 390 391 (void)printf("%*s", width, buf); 392 } 393 394 static void 395 prthuman(const struct statvfs *sfsp, int64_t used, int64_t bavail) 396 { 397 398 prthumanval((int64_t)(sfsp->f_blocks * sfsp->f_frsize), blksize_width); 399 prthumanval((int64_t)(used * sfsp->f_frsize), 1 + blksize_width); 400 prthumanval((int64_t)(bavail * sfsp->f_frsize), 1 + blksize_width); 401 } 402 403 /* 404 * Convert statvfs returned filesystem size into BLOCKSIZE units. 405 * Attempts to avoid overflow for large filesystems. 406 */ 407 #define fsbtoblk(num, fsbs, bs) \ 408 (((fsbs) != 0 && (uint64_t)(fsbs) < (uint64_t)(bs)) ? \ 409 (int64_t)(num) / (int64_t)((bs) / (fsbs)) : \ 410 (int64_t)(num) * (int64_t)((fsbs) / (bs))) 411 412 static void 413 addstat(struct statvfs *totalfsp, const struct statvfs *sfsp) 414 { 415 uint64_t frsize; 416 417 frsize = sfsp->f_frsize / totalfsp->f_frsize; 418 totalfsp->f_blocks += sfsp->f_blocks * frsize; 419 totalfsp->f_bfree += sfsp->f_bfree * frsize; 420 totalfsp->f_bavail += sfsp->f_bavail * frsize; 421 totalfsp->f_bresvd += sfsp->f_bresvd * frsize; 422 totalfsp->f_files += sfsp->f_files; 423 totalfsp->f_ffree += sfsp->f_ffree; 424 totalfsp->f_favail += sfsp->f_favail; 425 totalfsp->f_fresvd += sfsp->f_fresvd; 426 } 427 428 /* 429 * Print out status about a filesystem. 430 */ 431 static void 432 prtstat(const struct statvfs *sfsp, int maxwidth) 433 { 434 static long blocksize; 435 static int headerlen, timesthrough; 436 static const char *header; 437 static const char full[] = "100"; 438 static const char empty[] = " 0"; 439 int64_t used, availblks, inodes; 440 int64_t bavail; 441 char pb[64]; 442 char mntfromname[sizeof(sfsp->f_mntfromname) + 10]; 443 444 if (Wflag && sfsp->f_mntfromlabel[0]) { 445 snprintf(mntfromname, sizeof(mntfromname), "NAME=%s", 446 sfsp->f_mntfromlabel); 447 } else { 448 strlcpy(mntfromname, sfsp->f_mntfromname, sizeof(mntfromname)); 449 } 450 451 if (gflag) { 452 /* 453 * From SunOS-5.6: 454 * 455 * /var (/dev/dsk/c0t0d0s3 ): 8192 block size 1024 frag size 456 * 984242 total blocks 860692 free blocks 859708 available 249984 total files 457 * 248691 free files 8388611 filesys id 458 * ufs fstype 0x00000004 flag 255 filename length 459 * 460 */ 461 (void)printf("%10s (%-12s): %7ld block size %12ld frag size\n", 462 sfsp->f_mntonname, mntfromname, 463 sfsp->f_bsize, /* On UFS/FFS systems this is 464 * also called the "optimal 465 * transfer block size" but it 466 * is of course the file 467 * system's block size too. 468 */ 469 sfsp->f_frsize); /* not so surprisingly the 470 * "fundamental file system 471 * block size" is the frag 472 * size. 473 */ 474 (void)printf("%10" PRId64 " total blocks %10" PRId64 475 " free blocks %10" PRId64 " available\n", 476 (uint64_t)sfsp->f_blocks, (uint64_t)sfsp->f_bfree, 477 (uint64_t)sfsp->f_bavail); 478 (void)printf("%10" PRId64 " total files %10" PRId64 479 " free files %12lx filesys id\n", 480 (uint64_t)sfsp->f_ffree, (uint64_t)sfsp->f_files, 481 sfsp->f_fsid); 482 (void)printf("%10s fstype %#15lx flag %17ld filename " 483 "length\n", sfsp->f_fstypename, sfsp->f_flag, 484 sfsp->f_namemax); 485 (void)printf("%10lu owner %17" PRId64 " syncwrites %12" PRId64 486 " asyncwrites\n\n", (unsigned long)sfsp->f_owner, 487 sfsp->f_syncwrites, sfsp->f_asyncwrites); 488 489 /* 490 * a concession by the structured programming police to the 491 * indentation police.... 492 */ 493 return; 494 } 495 if (maxwidth < 12) 496 maxwidth = 12; 497 if (++timesthrough == 1) { 498 switch (blocksize = usize) { 499 case 512: 500 header = "512-blocks"; 501 headerlen = (int)strlen(header); 502 break; 503 case 1024: 504 header = Pflag ? "1024-blocks" : "1K-blocks"; 505 headerlen = (int)strlen(header); 506 break; 507 case 1024 * 1024: 508 header = "1M-blocks"; 509 headerlen = (int)strlen(header); 510 break; 511 case 1024 * 1024 * 1024: 512 header = "1G-blocks"; 513 headerlen = (int)strlen(header); 514 break; 515 default: 516 if (hflag) { 517 header = "Size"; 518 headerlen = (int)strlen(header); 519 blksize_width = 6; 520 } else 521 header = getbsize(&headerlen, &blocksize); 522 break; 523 } 524 525 if (blocksize >= 1024 * 1024) 526 blksize_width -= 3; 527 if (blocksize >= 1024 * 1024 * 1024) 528 blksize_width -= 3; 529 if (blksize_width < headerlen) 530 blksize_width = headerlen; 531 532 if (Pflag) { 533 /* 534 * either: 535 * "Filesystem 1024-blocks Used Available Capacity Mounted on\n" 536 * or: 537 * "Filesystem 512-blocks Used Available Capacity Mounted on\n" 538 */ 539 if (blocksize != 1024 && blocksize != 512) 540 errx(EXIT_FAILURE, 541 "non-standard block size incompatible with -P"); 542 (void)printf("Filesystem %s Used Available Capacity " 543 "Mounted on\n", header); 544 } else if (!Nflag) { 545 (void)printf("%-*.*s %*s %*s %*s %%Cap", 546 maxwidth, maxwidth, "Filesystem", 547 blksize_width, header, 548 blksize_width, "Used", 549 blksize_width, "Avail"); 550 if (iflag) { 551 (void)printf(" %*s %*s %%iCap", 552 WIDTH_INODE, "iUsed", 553 WIDTH_INODE, "iAvail"); 554 } 555 (void)printf(" Mounted on\n"); 556 } 557 } 558 used = sfsp->f_blocks - sfsp->f_bfree; 559 bavail = sfsp->f_bfree - sfsp->f_bresvd; 560 availblks = bavail + used; 561 if (Pflag) { 562 assert(hflag == 0); 563 assert(blocksize > 0); 564 /* 565 * "%s %d %d %d %s %s\n", <file system name>, <total space>, 566 * <space used>, <space free>, <percentage used>, 567 * <file system root> 568 */ 569 (void)printf("%s %" PRId64 " %" PRId64 " %" PRId64 " %s%% %s\n", 570 mntfromname, 571 fsbtoblk(sfsp->f_blocks, sfsp->f_frsize, blocksize), 572 fsbtoblk(used, sfsp->f_frsize, blocksize), 573 fsbtoblk(bavail, sfsp->f_frsize, blocksize), 574 availblks == 0 ? full : strspct(pb, sizeof(pb), used, 575 availblks, 0), sfsp->f_mntonname); 576 /* 577 * another concession by the structured programming police to 578 * the indentation police.... 579 * 580 * Note iflag cannot be set when Pflag is set. 581 */ 582 return; 583 } 584 585 if (fflag) { 586 if (iflag) 587 (void)printf("%jd", sfsp->f_ffree); 588 else if (hflag) 589 prthumanval(bavail * sfsp->f_frsize, 1); 590 else 591 (void)printf("%jd", fsbtoblk(bavail, 592 sfsp->f_frsize, blocksize)); 593 594 if (mntcount != 1) 595 (void)printf(" %s\n", sfsp->f_mntonname); 596 else 597 (void)printf("\n"); 598 return; 599 } 600 601 (void)printf("%-*.*s ", maxwidth, maxwidth, mntfromname); 602 603 if (hflag) 604 prthuman(sfsp, used, bavail); 605 else 606 (void)printf("%*" PRId64 " %*" PRId64 " %*" PRId64, 607 blksize_width, 608 fsbtoblk(sfsp->f_blocks, sfsp->f_frsize, blocksize), 609 blksize_width, fsbtoblk(used, sfsp->f_frsize, blocksize), 610 blksize_width, fsbtoblk(bavail, sfsp->f_frsize, blocksize)); 611 (void)printf(" %3s%%", 612 availblks == 0 ? full : 613 strspct(pb, sizeof(pb), used, availblks, 0)); 614 if (iflag) { 615 inodes = sfsp->f_files; 616 used = inodes - sfsp->f_ffree; 617 (void)printf(" %*jd %*jd %4s%%", 618 WIDTH_INODE, (intmax_t)used, 619 WIDTH_INODE, (intmax_t)sfsp->f_ffree, 620 inodes == 0 ? (used == 0 ? empty : full) : 621 strspct(pb, sizeof(pb), used, inodes, 0)); 622 } 623 (void)printf(" %s\n", sfsp->f_mntonname); 624 } 625 626 static void 627 usage(void) 628 { 629 630 (void)fprintf(stderr, 631 "Usage: %s [-aclnW] [-G|-bkP|-bfgHhikmN] [-t type] [file | " 632 "file_system]...\n", 633 getprogname()); 634 exit(1); 635 /* NOTREACHED */ 636 } 637
Indexes created Wed Oct 01 18:09:54 GMT 2025